Set:
Oath of the Gatewatch
Type:
Artifact — Equipment
Rarity:
Rare
Cost:
{1}
Equipped creature gets +1/+1 for each other creature you control that shares a creature type with it.
Equip {2}
The nomadic kor carry only necessities on their long treks. The coming of the Eldrazi redefined "necessities."

Set:
Guilds of Ravnica
Type:
Enchantment
Rarity:
Rare
Cost:
{3}{R}
You may look at the top card of your library any time. You may play the top card of your library. You can't play cards from your hand. {3}{R}: Destroy Experimental Frenzy.
Turns out coffee is the weird aunt of invention.

Set:
Guilds of Ravnica
Type:
Creature — Human Shaman
Rarity:
Uncommon
Cost:
{2}{B}
When Plaguecrafter enters the battlefield, each player sacrifices a creature or planeswalker. Each player who can't discards a card.
"My power is generosity, in a way. I give my survivors an appreciation for their lives."

Set:
Guilds of Ravnica
Type:
Land — Mountain Plains
Rarity:
Rare
Cost:
({T}: Add {R} or {W}.) As Sacred Foundry enters the battlefield, you may pay 2 life. If you don't, Sacred Foundry enters the battlefield tapped.
"You will not be trained here. You will be forged." —Commander Yaszen

Set:
Kaladesh
Type:
Artifact
Rarity:
Rare
Cost:
{4}
Whenever you cast a spell, you gain 1 life for each spell you've cast this turn.
Pay 50 life: Aetherflux Reservoir deals 50 damage to target creature or player.
While most power is used for ordinary, everyday tasks, one shouldn't underestimate its potential for the extraordinary.

Set:
Guilds of Ravnica
Type:
SorcerySorcery
Rarity:
Rare
Cost:
{B/G}{B/G}{4}{B}{G}
Find
Return up to two target creature cards from your graveyard to your hand.
Finality
You may put two +1/+1 counters on a creature you control. Then all creatures get -4/-4 until end of turn.

Set:
Dominaria
Type:
Legendary Creature — Human Wizard
Rarity:
Rare
Cost:
{1}{W}{U}{R}
Flying
You may pay {W}{U}{B}{R}{G} rather than pay the mana cost for spells that you cast.
"Chronicles across the ages describe Jodah. They likely refer not to one mage, but to a family or an arcane title." — Arkol, Argivian scholar

Set:
Guilds of Ravnica
Type:
Creature — Nightmare Sphinx
Rarity:
Mythic
Cost:
{4}{U}{U}
Flash
Flying
When Dream Eater enters the battlefield, surveil 4. When you do, you may return target nonland permanent an opponent controls to its owner's hand. (To surveil 4, look at the top four cards of your library, then put any number of them into your graveyard and the rest on top of your library in any order.)

Set:
Rivals of Ixalan
Type:
Instant
Rarity:
Common
Cost:
{1}{B}
Target creature gets -2/-2 until end of turn. You gain 2 life.
"The time of condemnation is at hand. Dusk washes over the world, and I consign you to eternal darkness!"

Set:
Guilds of Ravnica
Type:
Instant
Rarity:
Rare
Cost:
{U}{U}
Surveil 2, then choose an instant or sorcery card in your graveyard. You may cast that card this turn. If that card would be put into your graveyard this turn, exile it instead. (To surveil 2, look at the top two cards of your library, then put any number of them into your graveyard and the rest on top of your library in any order.)

Set:
Guilds of Ravnica
Type:
Land — Swamp Forest
Rarity:
Rare
Cost:
({T}: Add {B} or {G}.) As Overgrown Tomb enters the battlefield, you may pay 2 life. If you don't, Overgrown Tomb enters the battlefield tapped.
Cradle of the Golgari's new kingdom. Grave of those who wronged its queen.

Set:
Guilds of Ravnica
Type:
Creature — Nightmare Demon
Rarity:
Mythic
Cost:
{3}{B}{B}
Flying, trample Pay 2 life: Surveil 2. (Look at the top two cards of your library, then put any number of them into your graveyard and the rest on the top of your library in any order.)
The sound of every twisted secret tempts you to hear another.

Set:
Guilds of Ravnica
Type:
Artifact
Rarity:
Rare
Cost:
{3}
Lands you control have "{T}: Add one mana of any color."
{T}: Add one mana of any color.
By guild tradition, any puddle of multicolored light on the cobblestones can serve as neutral ground.

Set:
Ixalan
Type:
Legendary EnchantmentLegendary Land
Rarity:
Rare
Cost:
{W}
Legion's Landing
When Legion's Landing enters the battlefield, create a 1/1 white Vampire creature token with lifelink.
When you attack with three or more creatures, transform Legion's Landing.
"I claim this land in the name of the queen." —Adrian Adanto of Lujio
Adanto, the First Fort
(Transforms from Legion's Landing.)
{T}: Add {W} to your mana pool.
{2}{W}, {T}: Create a 1/1 white Vampire creature token with lifelink.

Set:
Dominaria
Type:
Instant
Rarity:
Common
Cost:
{U}
Scry 1. (Look at the top card of your library. You may put that card on the bottom of your library.) Draw a card.
The crystal pulsed with the power of Teferi's planeswalker spark. Had Jhoira given him a blessing or a curse?